I've been feeding the hummers for the last 6 or 7 years the most we get is 2-3 hummers. Needless to say the syrup spoils before it's used up. So I thought if I used some HBH it might last longer, it's hard to tell when it goes bad. I just want to make sure the HBH won't hurt the hummers and it won't chase them away.